.TH std::chrono::day::ok 3 "2024.06.10" "http://cppreference.com" "C++ Standard Libary"
.SH NAME
std::chrono::day::ok \- std::chrono::day::ok

.SH Synopsis
   constexpr bool ok() const noexcept;  \fI(since C++20)\fP

   Checks if the day value stored in *this is in the valid range, i.e., [1, 31].

.SH Return value

   true if the day value stored in *this is in the range [1, 31]. Otherwise false.

.SH Example


// Run this code

 #include <chrono>
 using namespace std::chrono_literals;

 constexpr std::chrono::day d0{00};
 constexpr std::chrono::day d1{13};
 constexpr std::chrono::day d2{42};

 static_assert
 (
     d0 == 0d && !d0.ok() &&
     d1 == 13d && d1.ok() &&
     d2 == 42d && !d2.ok()
 );

 int main() {}

.SH See also

   operator unsigned retrieves the stored day value
                     \fI(public member function)\fP
